JR4PWV — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM64

Receiver-side FT8 activity involving JR4PWV, decoded by SO8OO in southeastern Poland. 28 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-05.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 28 FT8 messages attributed to JR4PWV as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (39%), followed by 20 m (39%) and 40 m (21%). Most decodes (68%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

28
Messages attributed
8
UTC dates decoded
13
Active 15-min windows
-11 dB
Estimated median S/N

Bands

First attributed message: 2026-06-06
Last attributed message: 2026-11-05 15:22 UTC

Observed FT8 message patterns

Attributed sample
28 messages
Active dates
8 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-23 to -1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 11.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to JR4PWV

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator
PM64 · 16 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,453 km (approx.)
Last such locator decoded
2026-11-05 15:22 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Time UTCBandJR4PWV S/NCounterpartCounterpart S/NMsgsCapture
11-05 15:22 80m -20 / - YO9HP - / - 2 Partial capture
11-05 15:07 80m - / - DK1WB +4 / - 3 Partial capture
11-05 15:07 80m - / - SP7VTQ +3 / - 2 Partial capture
11-05 15:05 80m -11 / -11 SV9CVY -23 / -12 6 ✓ Full exchange observed
11-03 15:41 80m - / -16 S54E +12 / - 3 Partial capture
11-03 15:40 80m - / - RA3UEV +4 / - 5 Partial capture
11-03 15:38 80m - / -13 SM2LIY -9 / - 4 ✓ Closing fragment
11-01 15:30 80m - / - RY7F -5 / - 3 Partial capture
10-31 15:18 80m - / -15 YO7CFD +2 / - 2 Partial capture
10-30 21:45 80m - / - RO2X +1 / - 3 Partial capture
10-30 14:41 40m - / -14 SP6FME -9 / - 3 Partial capture
10-27 21:32 80m - / - EA7ALL -2 / - 2 Partial capture
10-23 15:50 80m - / -15 4O4A +16 / - 2 ✓ Closing fragment
10-11 15:38 80m - / - RK6OQ -6 / - 4 Partial capture
10-09 15:25 80m - / -13 EU2ABM +4 / - 2 ✓ Closing fragment
10-06 21:24 80m - / - S57MPU +12 / - 2 Partial capture
10-05 19:59 80m - / -19 HB9BLQ +16 / - 2 ✓ Closing fragment
10-05 19:50 80m - / -21 UX5UO +6 / - 3 ✓ Closing fragment
10-05 19:48 80m - / -19 OK2SFP +13 / - 3 ✓ Closing fragment
10-05 19:38 80m - / -25 HB9BLQ +4 / - 2 Partial capture
10-05 19:26 80m - / -20 EA7TR +4 / - 2 ✓ Closing fragment
10-05 15:58 80m - / -15 S59A +6 / - 2 ✓ Closing fragment
10-05 15:15 80m - / - RA3BQ -7 / - 2 Partial capture
10-04 20:06 80m - / -13 OT7K +16 / - 2 ✓ Closing fragment
10-02 19:18 80m - / - UX1AA -10 / - 8 Partial capture
10-01 15:38 80m - / - UI4I -6 / - 2 Partial capture
10-01 14:37 80m - / -12 OM5FM +11 / - 3 ✓ Closing fragment
10-01 14:21 80m - / -7 OH1MLZ -12 / - 2 ✓ Closing fragment
09-30 19:50 80m - / - UX1AA +1 / - 4 Partial capture
09-30 19:46 80m - / - UX1AA -5 / - 4 Partial capture
09-30 19:29 80m - / - RK6OQ -10 / - 2 Partial capture
09-30 19:25 80m - / -19 RA2FCF -2 / - 2 ✓ Closing fragment
09-30 16:30 80m - / - SP9DWT +2 / - 4 Partial capture
09-30 16:28 80m - / -26 ON4IQ +6 / - 6 ✓ Closing fragment
09-30 16:21 80m - / -10 LA9GX +6 / - 5 ✓ Closing fragment
09-30 16:18 80m - / -20 ON4IQ +2 / - 5 Partial capture
09-30 16:15 80m - / -16 OE3KLU +18 / - 4 ✓ Closing fragment
09-30 16:15 80m - / -17 RA3ZK -5 / - 4 ✓ Closing fragment
09-30 16:15 80m -24 / -19 YT6AAA -1 / -14 3 ✓ Full exchange observed
09-30 16:13 80m - / - ON4IQ -2 / - 4 Partial capture
09-30 16:06 80m - / - ON4IQ +3 / - 3 Partial capture
09-30 16:05 80m - / - UA6HJT -14 / - 2 Partial capture
09-30 16:05 80m - / - YT6AAA -4 / - 5 Partial capture
09-30 16:02 80m - / -23 RQ7O +1 / - 4 ✓ Closing fragment
09-30 15:59 80m - / -9 LZ1GC 0 / - 7 ✓ Closing fragment
09-30 15:59 80m - / -14 HA7XL +8 / - 4 ✓ Closing fragment
09-30 15:59 80m - / - LA9GX -3 / - 5 Partial capture
09-30 15:58 80m -24 / -11 EV1R +8 / - 3 ✓ Closing observed
09-29 21:32 80m - / - UX5UO +17 / - 3 Partial capture
09-29 21:31 80m - / -16 5B4AMM +6 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

80m
UTC    dB Audio  Message
154215 -10 1430  JR4PWV RA3UEV LO07
154245 +12 1226  JR4PWV S54E -16
150530 -10  955  SV9CVY JR4PWV PM64 (x2)
150645 -22 2816  JR4PWV SV9CVY -11
150700 -11  954  SV9CVY JR4PWV R-12
150715 -24 2815  JR4PWV SV9CVY RR73
150730 -12  954  SV9CVY JR4PWV 73
150745  +4 1917  JR4PWV SP7VTQ KO00
150745  +7 2132  JR4PWV DK1WB JO50
150815  +2 1917  JR4PWV SP7VTQ KO00
150815  +6 2132  JR4PWV DK1WB JO50 (x2)
152200 -21  612  YO9HP JR4PWV PM64 (x2)
40m
UTC    dB Audio  Message
234045 -13  229  JR4PWV 4X1UF -24 (x8)
235030  -2  620  JR4PWV CT9/DF7EE -19
144100  -6 2913  JR4PWV UB2FEK RR73
144130  -9 2162  JR4PWV SP6FME JO90 (x3)
144430 -11 2161  JR4PWV RA3ZH KO81
144500 -18 1231  JR4PWV RA6FSV LN05
160m
UTC    dB Audio  Message
161545 -14 2146  JR4PWV UA3EDQ KO72
161545 -14 2339  JR4PWV OH2XX -24
161615  -5 2146  JR4PWV UA3EDQ R-13
161615  -9  976  JR4PWV RA3QTT LO01
161645  -5 2146  JR4PWV UA3EDQ 73
161645  -8  976  JR4PWV RA3QTT LO01 (x3)

Decoder S/N history by band

Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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